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Online since: November 2012
Authors: Wu Jiao Xu, Ming Ping Zou, Peng Cheng Wang
The reduction in height is 60% at the end of the compression.
It is obvious that, under different deformation temperatures, the data of lnand lnσ can be approximated by a group of parallel and straight lines by linear fit method.
It could be observed that the predicted flow stress value could track the experimental data throughout the temperature and strain rate range.
N is the number of data employed in the investigation.
Online since: October 2014
Authors: Y. Kim, Hyung Sun Kim, Soo Ryong Kim, Woo Teck Kwon, Seong Min Jeong, Dong Geun Shin, Kang Huk Lee
This is detrimental to the AlN nucleation process. [4] Other significant problem of the oxygen impurity is the reduction of thermal conductivity and suspected to the formation of stacking faults in the AlN crystal. [4] Other important factor in PVT method is highly packing of the powders that are depending on the particle size distribution.
(a) (b) Fig. 2 (a) Particle size distribution of AlN powders of initial and after thermocyclic heat treatments (b) XRD data of AlN powders of initial and after thermocyclic heat treatments.
Table 1 shows that chemical analysis data of AlN powders of initial and after thermocycle.
Chemical analysis data of AlN powders Impurities (%) AlN Thermocycled AlN O 1.47 0.34 C 0.03 0.02 Sn 0.02 - Na 0.02 0.02 S 0.01 0.01 P 0.01 - Ca 0.01 - Fe <0.01 - Mg <0.01 - AlN purity 98.4 99.6 Summary In this work, we studied the thermocyclic effect on the purification and growth of AlN powder.
Online since: November 2011
Authors: Anderson William Simões Borges, Marcio Roberto Covacic
Introduction Operational control, which now demand all the data flow, pressure, level of operation of the reservoir and pumping of raw water and treated, they are poorly made.
In most cases, these data are transmitted via radio system and noted a report by an operator operation, where only the calculation is done monthly production volume of the system by the number of pumping hours and compared with the measurement or macro when the results hit the volumes measured macro, the two figures show the unreliability of the system and measurement of the macro itself.
With the reduction in power costs the Company may invest in equipment such as control valves Pressure and flow, purchase of computers and a program for transmitting data via on-line training for operators, who will benefit by intervening subjectively where in the system and perform tasks according to the degree of personal experience gained in performing their daily activities.
Online since: December 2012
Authors: Natalya Valentinovna Makarova, Marina Vasilyevna Polonik
(14) Reduction of surface integral to repeat integral allows receiving the integrated solution:
Comparisons of the calculated results by equations (18), (19) with experimental data are shown in Fig. 4.
Comparisons of the calculated results by equations (18), (19) with experimental data Summary The following conclusions have been obtained: 1.
Comparisons of the calculated results with experimental data have shown that the offered model can be used for optimization of concrete structure. 4.
Online since: June 2017
Authors: Vyacheslav V. Maksarov, A. Khalimonenko
The absence of binding phase brings about a significant reduction of the ceramic cutting materials softening during its heating, reduced tools wear and its increased plastic strength [5].
For determining the composition and microstrictural parameters of VOK 63 grade oxide-carbide ceramics in specially prepared samples of cutting bits, we used computer software allowing to perform their comprehensive analysis, including the possibility of automatic counting and automatic measurements of the objects under study, sorting the obtained data and tracking the selected objects.
Processing of the data obtained in the process of studying the selected oxide-carbide ceramic bits has revealed that average carbide grain sizes (D) are within the range from 1.1 to 2.9 μm, their quantity in the square under study (H) is within the range from 19 to 52, the total length of grain boundary (С) amounts to 4.9...8.1 · 1/mm2 · 102, porosity percentage is within the range from 7 to 14%.
Measurement data demonstrated that the bit that covered the shortest distance before failure had average carbide grain diameter 2.2 μm, their total quantity in the square under study amounted to Н = 21 grains, the total length of grain boundary С = 7.76 · 1/mm2 · 102, porosity percentage was equal to 12%.
Online since: June 2013
Authors: Muguras Mocofan, Vasiu Radu
The data from the video sequence that represents the dynamic texture are loaded in a 3D matrix.
The application of the co-occurrence matrix is performed for each frame of the data parallelepiped covered in 3 directions.
Indexing corresponds to the organization of data according to an order defined by one or more attributes.
Increasing computer power and the importance of the video data stream has generated the recent outbreak of numerous studies on the dynamic textures.
This is a very complex data set [12].
Online since: August 2011
Authors: Xiang Lu, Xue Sen Chen, Ke Sheng Meng
Noise reduction can use kalman filter and wavelet filtering method.
They are descriptive data mining analysis and prophetic data mining analysis
(1) descriptive data mining based on summary of data describes the general properties, providing normal character of data.
Common descriptive data mining analysis methods include anomaly detection, gathered and so on; (2) prophetic data mining is the data analysis by establishing a or a group of model.
Statistical model can learn from the actual data, the typical representative is neural network and data mining system[13].
Online since: June 2012
Authors: Shi Qun Shen, Li Na Zhu, Hong Wei Xue, Zhi Guo
This article given one kind of dynamic encryption algorithm models based on the ergodic matrix and proves the algorithm security according to the analysis on massive empirical datum.
Time cost of SA according to plaintext length TC ML PT GT RT ET DT 100byte 0.015 35.5 0.063 35.6 45.6 200byte 0.015 35.5 0.120 35.6 54.2 300byte 0.016 35.5 0.174 35.7 63.1 500byte 0.016 35.5 0.245 35.8 83.8 1000byte 0.030 35.5 0.422 36.0 138.9 2000byte 0.064 35.5 0.813 36.4 242.5 By Table2, the main time expenses of the G part mainly concentrate in the structure of EM_SET, the time producing EM_SET and the size of EM_SET is proportional, through statistics to the empirical datum, and the average time which structures an ergodic matrix is probably 0.2 second.
However, regarding A kind of algorithm, the size of EM_SET had decided the space of instruction selection, the reduction of EN can increase the probability of the instruction repetition using, and make the trace times that probe the decipher instruction obviously increasing.
Online since: October 2011
Authors: Wen Bo Wang, Lei Wang
This is useful for the increment of the scientific, modern management level, the economic benefit, and the reduction of the enterprise operating costs.
Therefore, ensuring data maintenance uniqueness is critical for the construction of marketing-distribution integrated system. 2)Data sharing In the data structure design of marketing-distribution integrated system, the demands of information differentiation should be considered.
Therefore, normative data formats should be provided, in order to ensure the data sharing. 3)System expansibility A good system should have expansibility.
The repeated processes of information data affect the overall efficiency of information systems seriously.
Generic Data Access[S].
Online since: March 2010
Authors: Xi Fa Yu, Ci Xiang Li, Jing Lin, Su Jun Yi
As show in Fig. 2, the task of digitalization and data processing subsystem is to measure and planning, measure and data conversion.
The main content of data pre-processing includes the elimination of noise signal for measurement data ,probe radius compensation, data-border processing, data blocks splice, data vacancy filling & re-sampling, and data partitioning content.
Data conversion interface is used to transform the measurement data points directly into NC code and STL files.
The first aim is to avoid the massive cloud of data points could bring difficulties to the follow-up operation and treatment; secondly, it is in order to balance the contradictions between reduction in the data amount and the decline in descriptive accuracy.
TRACECUT also adds the optional data interface (VDA-FS, IGES, etc.), generating CAD data of surface information.
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